Direct Link Assignment Approach for IEEE 802.16 Networks

摘要

The point-to-multipoint (PMP) mode is considered a well-adopted transmission type supported by IEEE 802.16 standard. With the consideration of direct communications among mobile stations (MSs), the required bandwidth and packet latency are reduced. However, inappropriate arrangements of direct communications may introduce additional inter-cell interferences. In order to avoid this situation, a direct link assignment (DLA) approach for each pair of MSs that are expected to conduct direct communication is proposed in this paper. Based on calculated interference region and feasible region as well as predicted motion for each pair, the DLA approach properly arranges the MSs to conduct direct communication. The efficiency of the proposed DLA approach is evaluated via simulations. Simulation studies show that the DLA approach efficiently enhances the performance of user throughput in comparison with the original adaptive point-to-point (APC) approach and the conventional IEEE 802.16 scheme.